Improvement in planing-machines



A. H. FRANK &. G. SPIBEK Planing-Machines.

N0. 143,'232, PatentedSeptembeISO,1873.

PATENT OFFICE ANDREW H. FRANK AND GEORGE SPIRE, OF BUFFALO, NEW YORK.

IMPROVEMENT IN PLANlNG-MACHINES.

Specification forming part of Letters Patent No. 143,232, datedSeptember 30, 1873; application filed June 14, 1873.

To all whom it may concern:

Be it known that we, ANDREW H. FRANK and GEORGE SPIRE, both of the cityof Buffalo, in the county of Erie and State of New York, have inventedcertain Improvements in Wood-Planing Machines, of which the following isa specification:

Our invention relates to an improved means for changing the speed ornumber of revolutions of the feed-rollersof a planing-machine; and itconsists, principally, of a pulley composed of two or more concentriccylinders capable of being readily secured together or separated, so asto increase or reduce the size of the pulley, as maybe required.

In the accompanying drawing, Figure l is a side elevation of aplaning-machine provided with our improvements. Fig. 2 is a fragmentaryfront elevation thereof. Fig. 3 is anenlarged sectional view of ourimproved pulley in line 00.x, Fig. 4. Fig. 4 is a front elevation of thepulley with the outer cylindrical portion in section. Fig. 5 shows thepulley with the outer portion removed.

Like letters ofreference designate like parts in each of the figures.

A represents one of the side frames of a wood-planing machine; b, thecutter-shaft; B, the cutters, driven in the ordinary mannor; 0, adriving-pulley mounted on shaft 0; D D D, gear-wheels for transmittingmotion to the feed-rolls5 and e, a counter-shaft, car rying the pulleysE F. The pulleys G and. E are connected by an endless belt, 6. All ofthese parts are constructed and arranged in a common and well-knownmanner. G is the pulley, mounted on the outer end of the cuttor-shaft b,for transmitting motion to the pulley F by means of an endless belt, h.It

is composed of an inner cylinder or pulley proper, g, keyed or otherwisesecured to the shaft b, and one or more concentric cylinders, g, fittingupon the pulley proper g, and one upon the other, when more than one areused, only one cylinder, g, being shown in the drawing. The cylinder gis secured to the pulley proper g by a fastening-pin, z, secured in thecylinder 9, and projecting inwardly into a knee-shaped recess or cavity,j, formed in the face of the pulley proper g, and extendin g to the sidethereof, as shown at k.

In order to connect the parts 9 and g together, the cylinder 9 is soplaced against the.

pulley g that the pin z coincides with the outer end is of the cavity j,when, by moving the part g laterally until the fastening-pin strikes theinner end of the cavity j, and partly turning it in the direction inwhich the pulley revolves, the pin' 6 is brought into the position shownin Fig. 4, whereby the parts are firmly locked together.

When two cylinders, g, are. employed, the inner one is provided with asimilar cavity, j, for the reception of the fastening-pin of the outercylinder.

Any other suitable device for connecting the cylinders g with the pulleyproper g, such as a key or lateral setscrew, may, however, be employed,if preferred.

L represents a ti ghtcning-roller, pressing against the endless belt h,and mounted on the short arm m of the lever M, turning on a pivot, a.The outer end of the lever M is held in its respective position by'thenotches of an are or segment, 0, secured to the side frame A.

It is evident from the foregoing that the size of the pulley G isreadily reduced by re moving the cylinder g, and increased by reapplyingthe same, thereby diminishing or increasing the speed of thefeed-rollers, as the nature of the work may require.

When the cylinder 9 is removed from the pulley proper g, the belt hbecomes slack, and is tightened again by adjusting the roller L andlever M in an obvious manner.

Our improved pulley meetsiall the requirements for which ordinarilystep-pulleys are used, and is less expensive in its construction,

while it requires no more space laterally than an ordinary simplepulley.

We claim as our invention- The pulley G, composed of the pulley prope gand one or more concentric cylinders, g,

capable of being readily secured thereto and detached therefrom by meansof the fastening-pin t and cavity j, substantially as and for thepurpose hereinbefore set forth.

ANDREW H. FRANK. GEORGE SPIKE.

Witnesses:

JOHN J. BONNER, EDWARD WILHELM.

